CHILLED BEAM’S AIR DISTRIBUTION MEASUREMENTS AND PLANE WALL JET MODELING
The objective of this study is to present the performance of a chilled beam system and to validate a non-isothermal plane jet model with which the air distribution of chilled beam can be predicted in an undisturbed condition. In this paper, we measured and modelled the air distribution of chilled beams in a typical office room. The velocity and temperatures of the wall jet were measured at six heights and at six different distances from the wall without disturbtion. The experiment implemented two airflow rates of 20 and 28 l/s with three cooling loads of 0, 40 and 100 W/m2. The results of the measurements show that the maximum velocities were close to the wall surface, and the maximum velocity of a chilled beam jet develops 25 to 50 mm from the wall. Below a height of 1.7 m, air velocities decrease continuously when approaching the floor level. The results of the calculations by nonisothermal plane air jet model indicated that the model did not predict the performance of the jet correctly under disturbed condition. The K function by neural network training of parts of the measurement results was applied in the plane jet model and validated by other four cases measurement results.
Chilled beam Air distribution Non-isothermal vertical plane jet
Guangyu Cao Jarek Kurnitski Panu Mustakallio Olli Sepp(a)nen
Department of Mechanical Engineering, Helsinki University of Technology, ESPOO 02150, Finland Halton Oy Haltonintie 1-3, Kausala, 47400, Finland
国际会议
北京
英文
2007-09-07（万方平台首次上网日期，不代表论文的发表时间）